Question

An iron block with mass slides down a
frictionlesshill of height . At the base of the hill, it collides with
andsticks to a magnet with mass .

Part A

What is the speed of the block and magnet immediately after
thecollision?

Part B

Now assume that the two masses continue
tomove at the speed from Part A until they encounter a
roughsurface. The coefficient of friction between the masses and
thesurface is . If the blocks come to rest after a
distance, which of the following
equations wouldyou use to find ?